MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 09/15/01 through 09/21/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 35,847 2,021,454
MED90 6,769 145,999
MED85 4,850 61,542
MED80 4,146 37,430
MED75 3,835 20,302
MED66 3,875 18,107
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,605 59,367
2-4 a.m. 575 12,367
4-6 a.m. 199 22,873
6-8 a.m. 857 40,826
8-10 a.m. 4,342 178,363
10-12 a.m. 10,317 399,600
12-2 p.m. 10,735 398,522
2-4 p.m. 12,539 522,059
4-6 p.m. 9,368 369,941
6-8 p.m. 4,420 138,738
8-10 p.m. 2,521 86,502
10-12 p.m. 1,844 75,676
__________ _____________ _________________
Total: 59,322 2,304,834
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 1,000
Davis 594
Irvine 237
Los Angeles 519
Riverside 60
San Diego 455
San Francisco 1,059
Santa Barbara 46
Santa Cruz 6
Lawrence Berkeley 120
Lawrence Livermore 10
Los Alamos 0
MELWEB 0
Searchlight 3,398
Other - UC 51,550
Other-Network UC 268
_____
59,322
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 11,718
Davis 9,357
Irvine 1,122
Los Angeles 19,724
Riverside 419
San Diego 4,341
San Francisco 31,991
Santa Barbara 27,054
Santa Cruz 58
Lawrence Berkeley 771
Lawrence Livermore 190
Los Alamos 0
MELWEB 0
Searchlight 0
Other - UC 2,194,841
Other-Network UC 3,248
_____
2,304,834
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.8
Standard deviation in seconds 2.2
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.5
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:43
Average session length (minutes:seconds) 20:40
Longest session recorded (minutes:seconds) 222:55
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 453.8
Retrievals per search - standard deviation 8249.4
Percent of searches completed with 0 results 32.3%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 59,322 11.1%
PRESENT 448,945 84.3%
INIT or CLOSE 24,112 4.5%
OTHER 234 0.0%
SEARCHes completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By index:
JOURNAL 5,318 6.3% 2,253 42.4% 3 697.2 3997.1
PERSONAL AUTHOR 21,133 25.0% 6,304 29.8% 7 111.3 1714.2
TITLE WORD 8,512 10.1% 3,576 42.0% 3 171.8 2250.7
SUBSET 136 0.2% 36 26.5% 28 422.2 1483.4
SUBJECT WORD 75 0.1% 35 46.7% 10 5348.9 15119.1
SUBJECT 1,475 1.7% 703 47.7% 15 471.1 4225.7
EXACT SUBJECT 2,447 2.9% 529 21.6% 33 567.6 4404.3
MAJOR SUBJECT 116 0.1% 31 26.7% 15 175.2 370.0
EXACT MAJOR SUBJ 261 0.3% 45 17.2% 24 205.4 525.0
EXACT TITLE 863 1.0% 496 57.5% 1 34.9 182.6
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 837 1.0% 239 28.6% 249 1980.2 4542.7
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 52 0.1% 30 57.7% 3,916 2577.4 2079.8
KEYWORD 31,320 37.0% 10,226 32.6% 17 970.5 13512.2
DATE 2,098 2.5% 558 26.6% 5 139.3 2080.7
LANGUAGE 3,519 4.2% 903 25.7% 24 389.9 2721.7
UNIQUE ID 131 0.2% 63 48.1% 1 1.0 0.0
ADDED 1,170 1.4% 551 47.1% 5 16.2 36.0
PUB TYPE 1,759 2.1% 392 22.3% 29 472.5 5639.4
AUTHOR AFFIL. 478 0.6% 180 37.7% 8 179.5 2257.4
CHEMICAL NAME 1 0.0% 1 100% 0 0.0 0.0
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 2,394 2.8% 930 38.8% 19 507.5 3081.2
AGE 128 0.2% 22 17.2% 10 70.7 157.8
ISN 28 0.0% 20 71.4% 1 1.0 0.0
ARTICLE 86 0.1% 20 23.3% 27 171.7 515.4
XXS 92 0.1% 47 51.1% 8 192.8 642.7
XMXS 69 0.1% 35 50.7% 11 79.7 329.9
XS 2 0 0.0% 0 0.0% 0 0.0 0.0
MXS 2 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 35 0.0% 31 88.6% 6 96.0 182.0
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By number of indexes:
Multiple 17,629 29.7% 6,296 35.7% 6 227.1 2503.6
Single 41,693 70.3% 12,847 30.8% 16 843.9 11712.4
PRESENT commands, by type:
MARC 34.3%
OPAC 27.0%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS